Welding torch attachment



Oct. 4, 1949. E. c. .JOHNSON 2,483,545

I WELDING TORCH ATTACHMENT I Filed oct. v, 1947 W20 /lO//5 IIS7111111111111(llllllllll/` INVEN-Tolz. Eve/'eff 6I Johnson BY y Affomeys Patented Oct. 4, 1949 U N Vl TED S TAT ES T 0F FICE WELDING ToRCH ATTACHMENT Everett C. Johnson, Chicago, .Illa

Application october 7, 1947, serial No. 778,507

(C1. v15s-e743 i 10 Claims. l

This invention relates to a Welding torch at'- tachment in the -for-m of asoldering tip adapted to be attached to the -tip for Anozzle of an oxyacetylene welding torch so as to enable the thus connected Welding torch to be used 'for body'- solderingof automobiles, tinning, silveresolder'ing and the like.

The primary `objectfof the invention is to provide a novel welding -torch attachment or soldering tip which may be readily attached to the tip or nozzle `of an Oxy-acetylene welding torch so as to enable the thus connected welding torch nozzle or tip 'to be `used for body-soldering of automobiles, tinning, silver-soldering and the like.

An additional object oi the invention is to construct the new Welding torch attachment or soldering tip, and .the component parts thereof, in such 'a manner that the vnew welding 'torch attachment maybe readily adapted to provide either a brush type of flame IVor a bulbous Vtype of name, as may be desired.

A further object of the Yinvention is to con-A struct the new Welding torch attachment or soldering tip in such a manner that 'the :same may be readily adjusted toprovide either a 1brush type of flame'or a bulbous type of flame, burning only acetylene gas fed :from the torch nozzleor tip into and through the new welding torch fattachment or -ti-p, -or a substantially hotter vflame which may be employed for brazing or pre-'heatingr of metals and which utilizes both acetylene gas and some oxygen fed from the welding torch nozzle or tip into and through the new Welding torch attachment or soldering tip, in vaddition to the air supplied to the new welding torch -attacl'iment or tip through the air por-ts in the burner tube.

Other and further objects of the present invention will be apparent from the following descriptionand claims and are illustrated in the acco'nfr panying draw-ings which, by way of illustration, show preferred `embodiments of the present invention and the principles thereof and 'what I. now consider to be vthe best 'mo'de in which I have contemplated .applying these principles Other embodiments of the invention ve'rre'odying the' same or equivalent principles may bel used -and structural changesmay be made as desired' by' tafehrnent or soldering tip applied to l:the nozzle or i'tiplo'f a conventialfacetylene welding torch;

Fig; "2 is an enlarged Y'ce'iii'fral longitudinal sece tional-1 `VView n Illine' "2g-:2 Vinlig. `'.l illustrating the o'nstrutinof the *new welding tbrhattachinerit or soldering' :tip and vshown-ig `the same as em*- bodying a relatively small diameter burner tube adapted te afford -a Ibrush type of flame `when the new Welding'tch'fttadllineift 0r Soldering tip is iin' b`1i=f use th 4nozzle Or tip of 'a conventional ionlyacetylene welding "torch,- as in Fis; 'l

Fig. 3 is an enlarged transverse sectional View 'n line-##14 31; "i-11d 'Il' lis fa central longitudinal sectional view illustrating -a-'rifoutlt Ycr'buriiei' tube of somewhat larger diameter' 'tliehiirner tube yillust-rated in Ziaid "may 'be substituted upon the supporting stem-oi the `'r'iewwelding torch attach'- made er' liable-'mein such, for example, as press; a hexipieiittifrg may be made/or natural or-seccaned synthetic rubber; er suitable fiei'cibl'e plasticflexible" material, and an intermediate' fa I ercririecting part or membei" VI! AIna-y be iliade; of any suitable metal 'fdr example, asbrass,

The irit'ern'fiediaY andi interconnecting member w includes -m ana @entrain arranged body pinnenV le wY his; preferably provided with a klirled pe''r'iplfreralv edge 'surface i9 (Fig. l)v to facilitate handling thereof. The intermediate' arid interconnecting' member f1 also includes 'a' forwardly 4le'iiftending' 'attaching portion or stein 210, which 'ifs somewhat' smaller in diameterthan themain and centrally arranged body portion 3'. Thislattaching' portion or stem 20 is -e'xterr'ially tnrfeaqed, as EL for the reception ojf' the ihtefii'ally '-tli dedrealid 'portion' 'of the burner tube :f5 (Fiel 'intermediate and interconnecting member I8 also embodies a tubular attaching portion or stem 22 which extends rearwaiuiy oi trie main and centrally arranged body poi-tion is. 'i'his rearwardly extending attaching portion or stem 22 has a centrally arranged and longitudinally extending passage 23 formed therein. 'ine iront end portion of the nexible rubber ntting It is slipped over and rictionaily fitted onto the tubular rearwardly extending attaching portion or stem 22 of the intermediate and interconnecting member I8 so that the central passage 23 in the rearwardly extending attaching portion or stem 22 of the intermediate and interconnecting member 22 communicates with the central longitudinally extending passage 24 which is formed in the exible rubber fitting I5.

As shown in Fig. 2, a centrally arranged and longitudinally extending passage 25 is formed in and extends throughfthe `main and centrally arranged body portion I8 of the intermediate and interconnecting member I1 and through the forwardly-,extending attaching portion or stem 25. The passage 25 is or reduced diameter compared to the diameter of the central passage 23 in the rearwardly extending attaching portion or stem 22.

The Vinner end portion of the burner tube I has a, plurality of air inlet ports 21 formed in the wall thereof and arranged at spaced intervals radially therearound and these air inlet ports 26 communicate with the interior of the burner tube I5.

A metallic ierrule or reinforcing collar 28 is pressed upon the outer surface of the iront end portion of the exible or rubber tting I6. This metallic ferrule or reinforcing collar 28 has a plurality of parallel reinforcing or strengthening ribs 23 formed integral therewith. The metallic ferrule or collar 26 also has a substantially annular flange 3i) formed therein at the front end thereof and this substantially annular ange 30 extends down inwardly over andis pressed into gripping engagement with the front wall 3i of the flexible or rubber tting I6, as shown in Fig. 2.

In the use of the new welding torch attachment or soldering tip shown in Figs.f1 to 3, inclusive, of the drawings, the intermediate and interconnecting member I1 and the flexible or rubber fitting I6 may -be assembled in the manner shown, and as hereinbefore described. The ilexible or rubber tting I6 may then be slipped over and into frictional engagement with the outer end portion of the nozzle or tip I I of the welding torch I2, as shown in Fig. l.. The internally threaded rear end portion oi the burner tube I5 may then be screwed onto the externally threaded stein or forwardly extending attaching portion or stem Zof the intermediate and interconnecting member I1, so that the parts will be assembled in the relative positions in which they are shown in Figs. l, 2 and 3 of the drawing. The manually operable acetylene control valve I6 may then be opened, whereupon acetylene gas will flow through the central internal passage 24 in the flexibleor rubber fitting I6, through the central passage 23 in the rearwardly extending attaching portion or stem 22 of the intermediate or interconnecting member I1 and thence through the central passage 25 therein into the burner tube I 5.

, As the acetylene gas thus flows out of the relatively small .diameter central passage 25 inthe intermediate and interconnecting member I1 and into the burnerftube `I5 -it is mixed with the air entering the burner tube I5 by way of the air ports 26, whereupon the thus formed acetyleneair mixture may be ignited at the outlet end of the burner tube I5. When the thus formed acetyiene-air mixture is ignited and burns at the outer end o the burner tube It it forms a brush type of name which may be employed for so-called light soldering of jewelry, tinning, silver-soldering, and the like.

The main extend of the burner tube ISU, which is shown in Fig. 4 is of somewhat larger internal diameter than the burner tube shown in Figs. l, 2 and 3 but the internally threaded rear end portion 2id thereof is the same diameter as the internally threaded rear end portion 2i of the burner tube I5 so that the burner tube I5 may be detachably threaded onto the externally threaded attaching portion or stem 25 of the intermediate and interconnecting member I1.

Since the burner tube I5a shown in Fig. 4 is other wise identical in design and construction to the burner tube I5 the parts thereof have been given similar reference numerals followed by the additional and distinguishing reference character a.

In the use of the new welding torch attachment the tube I5 may be unscrewed from position of use upon the externally threaded attaching portion or stem 23 of the intermediate and interconnecting member I1 and the relatively larger diameter burner tube I5a screwed thereon. When thus mounted in position of use the burner tube |501. will aord a bulbous type of flame which may be employed for soldering automobile car bodies and in like instances inwhich such a bulbous type of name may be employed.

If desired, the manually operable control valve Ill for the oxygen supply of the welding torch I2 may be partially opened so as to mix a relatively small volume or proportion of oxygen with the acetylene which is being supplied through the torch tip I I to the new welding torch attachment lil so as to provide a substantially hotter flame at the outlet end of the burner tube I5 or 55a than is provided when only air entering the burner tube I5 by way of the air inlet ports 25 is mixed with the acetylene therein. This hotter type of flame aiorded by the oxygen-acetyleneair mixture may be employed for the brazing or pre-heating of metals. or for like purposes.

It will thus be seen that the present invention provides a new and improved welding torch attachment or soldering tip which hasthe desirable advantages and characteristics, and which accomplishes its intended objects, including those hereinbefore pointed out, and others which are inherent in the invention.

I claim:

Y l. A welding torch attachment comprising a flexible tubular fitting adapted 'to be detachably attached to the tip of a welding torch, a burner tube having an air inlet port therein, and an intermediate and interconnecting member disposed between and interconnected to the said ilexible tubular tting and to the said'burnerV tube, the said intermediate and interconnecting member having a centrally arranged gas-conducting passage formed therein and having means cooperating with the said burner tube for detachably mounting the said burner tube thereon, the said centrally arranged gas-conducting passage in the said intermediate and rinterconnecting member opening into the said burner tube adjacent the said air inlet port therein when i the said burner tube is assembled :in position lof use upon the said intermediate and interconnecting member.

2. A welding torch attachment as defined in claim 1 in which the said means on the said intermediate and interconnecting member ycooperating with the said burner tube for detac'hably mounting the said burner `tube .on the .said intermediate anddnterconne'cting member is comprised vof an externally threaded forwardly extending attaching portion or stem .formed on the said intermediate and interconnecting member and in which the said burner tube has an internally threaded inner end portion which is adapted to be detachably threaded onto the said externally threaded forwardly -extending -attaching portion or stem of the said intermediate and interconnecting member.

3. A welding torch attachment as defined in claim l in which the said means on the said intermediate and interconnecting member cooperating with the said burner tube for detachably mounting the said burner tube on the said intermediate and interconnecting member is comprised of an externally threaded forwardly extending attaching portion or stem formed on the said intermediate and interconnecting member and in which the said burner tube has an internally threaded inner end portion which is adapted to be detachably threaded onto the said externally threaded forwardly extending attaching portion or stem of the said intermediate and interconnecting member, and in which the said intermediate and interconnecting member includes a main central body portion disposed rearwardly of the said burner tube and the said flexible tubular fitting, and in which the said centrally arranged gas-conducting passage extends through the said main body portion of the said intermediate and interconnecting member and through the said forwardly extending externally threaded attaching portion or stem thereon.

4. A welding torch attachment as defined in claim l in which the said means on the said intermediate and interconnecting member cooperating with the said burner tube for detachably mounting the said burner tube on the said intermediate and interconnecting member is comprised of an externally threaded forwardly extending attaching portion or stem formed on the said intermediate and interconnecting member and in which the said burner tube has an internally threaded inner end portion which is adapted to be detachably threaded onto the said externally threaded forwardly extending attaching portion or stem of the said intermediate and interconnecting member, and in which the said intermediate and interconnecting member includes a main central body portion disposed rearwardly of the said burner tube and the said exible tubular fitting, and in which the said centrally arranged gasconducting passage extends through the said main body portion of the said intermediate and interconnecting member and through the said forwardly extending externally threaded attaching portion or stem thereon, and in which the said burner tube has a plurality of radially arranged air inlet ports formed in the inner end portion thereof and opening into the interior thereof adjacent the axially inner end of the said centrally arranged gas-conducting passage in the said intermediate and interconnecting member.

5. A welding torch attachment as dened in claim 1 in which the said means on the said intermediate and interconnecting member co- ESO 6 operating with the said burner tube for detachably 'mounting the `said burner tube on the said intermediate and interconnecting member is comprised of an Iexternally threaded forwardly extending attaching portion or stem formedV on the said intermediate and interconnecting member and in which the said Aburner tube has an internally threaded inner end portion which is adapted to be detachably threaded onto the said externally threaded forwardly extending attaching portion or stem of the said intermediate and interconnecting member, and in which the said intermediate and interconnecting member 'includes a main central body portion disposed rearwardly of the said burner tube and the said flexible tubular fitting, and in which the said lcentrally arranged gas-conducting passage extends through the said main body portion of the said intermediate and interconnecting member and through the said forwardly extending externally threaded attaching portion or stem thereon, and in which the said burner tube has a plurality of radially arranged air inlet ports formed in the inner end portion thereof and opening into the interior thereof adjacent the axially inner end of the said centrally arranged gas-conducting passage in the said intermediate and interconnecting member, and in which the said intermediate and interconnecting member includes a rearwardly extending tubular attaching portion or stem which extends into the interior of the said flexible tubular :fitting and has the said exible tubular tting frictionally fitted thereon.

6. A welding torch attachment comprising a flexible tubular fitting adapted to be detachably attached to the tip of a welding torch, a burner tube having an air inlet port therein. and an intermediate and interconnecting member disposed between and interconnected to the said flexible tubular fitting and to the said burner tube, the said intermediate and interconnecting member having a centrally arranged gasconducting passage formed therein and having means cooperating with the said burner tube for detachably mounting the said burner tube thereon, the said centrally arranged gas-conducting passage in the saidintermediate and interconnecting member opening into the said burner tube adjacent the said air inlet port therein when the said burner tube is assembled in position of use upon the said intermediate and interconnecting member.

7. A welding torch attachment as defined in claim 6 in which the said means on the said intermediate and interconnecting means cooperating with the said burner tube for detachably mounting the said burner tube on the said intermediate and interconnecting member is comprised of an externally threaded forwardly extending attaching portion or stem formed on the said intermediate and interconnecting member and in which the said burner tube has an internally threaded inner end portion which is adapted to be detachably threaded onto the said externally threaded forwardly extending attaching portion or stem of the said intermediate and interconnecting member.

8. A welding torch attachment as defined in claim 6 in which the said intermediate and interconnecting member includes a main central body portion disposed rearwardly of the said burner tube and the said flexible tubular fitting, and in which the said centrally arranged gas-conducting passage extends through the said main body portion of the said intermediate and interconnecting member andthrough the said forwardly extending externally threaded attaching portion or stem thereon.

19. A Welding torch attachment as dened in claim 6 in which the said burner tube has a plurality of radially arranged air inlet ports formed inthe inner end portion thereof and opening into theinterior thereof adjacent the axially inner end of the said centrally arranged gas-conducting passage in the said intermediate and interconnecting member.

Y 10.711 Welding torch attachment as dened in claimvAG invwhieh the said intermediate and interconnecting member includes a rearwardly extending tubular attaching portion or stem which extends into the interior of the said exible tubulartting and has the said flexible tubillar fit-l ting frictionally fitted thereon.

EVERE'I'I' C. JOHNSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 10 Number Name Date 1,702,731 Hymer Feb. 19, 1929 1,846,743 Mandeville Feb. 23,l 1932 Y Y FOREIGN PATENTS 15 Number Country Date 332,055 Italy Nov. 22, 1935 

